WooCommerce Order Delivery 2.6.3

* Feature - Assign to the order renewals the same weekday as the previous order delivery date.
* Feature - Keep the subscription's billing interval between delivery dates on order renewals.
* Tweak - Added the section 'Subscription Options' to the plugin settings.
* Tweak - Register the hook to locate the delivery fields in the checkout form only when the `WC_Checkout` object is initialized.
* Tweak - Declare incompatibility with WooCommerce High-Performance Order Storage (HPOS).
* Tweak - Tested compatibility with WC 7.1.
* Fix - Fixed the default values of the subscriptions' settings.
* Fix - Fixed warning when refreshing the time frame field in the subscription's delivery meta box for WC 7.1+.
* Fix - Fixed the location of the delivery date field when editing the subscription delivery preferences.
* Fix - Fixed nested `<section>` HTML tags when editing the subscription delivery preferences.

* Tweak - Tested compatibility with WC 7.0.
* Tweak - Tested compatibility with WP 6.1.
* Fix - The calendar wasn't shown again when scrolling on a mobile device until clicking on a different element.
* Dev - Updated bootstrap-datepicker.js library.

* Tweak - Improved the validation of the delivery fields during checkout.
* Fix - Fixed the 'State' selector field in the delivery calendar dialog.